Configure an axis to perform both throttle and break function for vehicles.
Enter editor.
Place man (player) and an empty vehicle at the end of the runway.
Press preview.
Get in vehicle.
Use both axis and keyboard for a short time.
Centre the axis just back but very close to the “0” point (~1% or 2% in the axis display range within the controls section), the vehicle will then accelerate more than expected if at the right point backwards, if this happens try to stop/correct it with keyboard inputs which will result in a change of direction even though the axis hasn’t moved and you are no longer toughing the keyboard.
Normal speed of the hunter is 100kph, turbo speed is 116kph (137kph for the ifrit) which can be achieved with the axis just rearward of the “0” point and an initial keyboard input to change direction.